Christmastide extends from the anniversary of the birth of Christ, officially established as December 25 by the Western church, to the Feast of the Epiphany twelve days later, January 6, which celebrates the manifestation of Christ to the Gentiles in the persons of the Magi. This joyous period was popularly called the "Twelve Days". It included New Year's Day, traditionally a time when midwinter fertility rites were performed as the season moved from barren winter toward burgeoning spring. The Twelve days also embraced more somber religious occasions such as the anniversary of the and the Massacre of the Innocents. But even these are overlaid with festivity, and generally speaking the time is one of revelry, mumming, the exchange of gifts, and feasting. In short, the events and customs usually associated with Christmas are spread across the Twelve Days.
The song goes, "On the first day of Christmas my true love gave to me..." The "true love" represents God and the "me" who receives these presents is the Christian.
The "partridge in a pear tree" was Jesus Christ who died on a tree as a gift from God.
The "two turtle doves" were the Old and New Testaments - another gift from God.
The "three French hens" were faith hope and love - the three gifts of the Spirit that abide (1 Corinthians 13).
The "four calling birds" were the four Gospels which sing the song of salvation through Jesus Christ.
The "five golden rings" were the first five books of the Bible also called the "Books of Moses."
The "six geese a-laying" were the six days of creation.
The "seven swans a swimming" were "seven gifts of the Holy Spirit"(I Cor 12:8-11, Rom 12, Eph 4, 1 Pet 4:10-11).
The "eight maids a milking" were the eight beatitudes.
The "nine ladies dancing" were nine fruits of the Holy Spirit (Galatians 5:22-23).
The "ten lords a-leaping" were the Ten Commandments.
The "eleven pipers piping" were the eleven faithful disciples.
The "twelve drummers drumming" were the twelve points of the Apostles' Creed.